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authorLinus Torvalds2018-04-03 12:25:44 -0700
committerLinus Torvalds2018-04-03 12:25:44 -0700
commitcc5ada7ca3618e25c1c2be29dad3c092573200d3 (patch)
tree3b9310236b7da5140f0d69726324321dad349308 /drivers/char
parent77624cd2a7783fccf2c518768a6fd7a7aeccd002 (diff)
parentc6185e285c5c7cfeab739bae7f206ced695f09c7 (diff)
Merge tag 'for-linus-4.17' of git://github.com/cminyard/linux-ipmi
Pull IPMI updates from Corey Minyard: "Mostly small changes, as usual. This does add an IPMI BMC server-side driver, to allow a Linux system to act as an IPMI controller. That's the biggest change, but it is just a new driver that is fairly narrow in use. The other largish change is removing ACPI SPMI probe support, which should have never really been there in the beginning" * tag 'for-linus-4.17' of git://github.com/cminyard/linux-ipmi: ipmi/parisc: Add IPMI chassis poweroff for certain HP PA-RISC and IA-64 servers ipmi_ssif: Fix kernel panic at msg_done_handler ipmi:pci: Blacklist a Realtek "IPMI" device ipmi: Remove ACPI SPMI probing from the system interface driver ipmi: Remove ACPI SPMI probing from the SSIF (I2C) driver ipmi: missing error code in try_smi_init() ipmi: use ARRAY_SIZE for poweroff_functions array sizing calculation ipmi: Consolidate cleanup code ipmi: Remove some unnecessary initializations ipmi: Fix some error cleanup issues ipmi: Add or fix SPDX-License-Identifier in all files ipmi: Re-use existing macros for built-in properties ipmi:pci: Make the PCI defines consistent with normal Linux ones ipmi: kcs_bmc: coding-style fixes and use new poll type char/ipmi: add documentation for sysfs interface ipmi: kcs_bmc: mark expected switch fall-through in kcs_bmc_handle_data ipmi: add an Aspeed KCS IPMI BMC driver ipmi: add a KCS IPMI BMC driver
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/ipmi/Kconfig15
-rw-r--r--drivers/char/ipmi/Makefile2
-rw-r--r--drivers/char/ipmi/bt-bmc.c6
-rw-r--r--drivers/char/ipmi/ipmi_bt_sm.c22
-rw-r--r--drivers/char/ipmi/ipmi_devintf.c22
-rw-r--r--drivers/char/ipmi/ipmi_dmi.c20
-rw-r--r--drivers/char/ipmi/ipmi_dmi.h2
-rw-r--r--drivers/char/ipmi/ipmi_kcs_sm.c22
-rw-r--r--drivers/char/ipmi/ipmi_msghandler.c22
-rw-r--r--drivers/char/ipmi/ipmi_powernv.c6
-rw-r--r--drivers/char/ipmi/ipmi_poweroff.c46
-rw-r--r--drivers/char/ipmi/ipmi_si.h1
-rw-r--r--drivers/char/ipmi/ipmi_si_hardcode.c1
-rw-r--r--drivers/char/ipmi/ipmi_si_hotmod.c1
-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c192
-rw-r--r--drivers/char/ipmi/ipmi_si_mem_io.c1
-rw-r--r--drivers/char/ipmi/ipmi_si_parisc.c1
-rw-r--r--drivers/char/ipmi/ipmi_si_pci.c44
-rw-r--r--drivers/char/ipmi/ipmi_si_platform.c155
-rw-r--r--drivers/char/ipmi/ipmi_si_port_io.c1
-rw-r--r--drivers/char/ipmi/ipmi_si_sm.h22
-rw-r--r--drivers/char/ipmi/ipmi_smic_sm.c24
-rw-r--r--drivers/char/ipmi/ipmi_ssif.c115
-rw-r--r--drivers/char/ipmi/ipmi_watchdog.c22
-rw-r--r--drivers/char/ipmi/kcs_bmc.c467
-rw-r--r--drivers/char/ipmi/kcs_bmc.h108
-rw-r--r--drivers/char/ipmi/kcs_bmc_aspeed.c320
27 files changed, 1067 insertions, 593 deletions
diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
index 3544abc0f9f9..3bda116c8aa0 100644
--- a/drivers/char/ipmi/Kconfig
+++ b/drivers/char/ipmi/Kconfig
@@ -96,6 +96,21 @@ config IPMI_POWEROFF
endif # IPMI_HANDLER
+config IPMI_KCS_BMC
+ tristate
+
+config ASPEED_KCS_IPMI_BMC
+ depends on ARCH_ASPEED || COMPILE_TEST
+ select IPMI_KCS_BMC
+ select REGMAP_MMIO
+ tristate "Aspeed KCS IPMI BMC driver"
+ help
+ Provides a driver for the KCS (Keyboard Controller Style) IPMI
+ interface found on Aspeed SOCs (AST2400 and AST2500).
+
+ The driver implements the BMC side of the KCS contorller, it
+ provides the access of KCS IO space for BMC side.
+
config ASPEED_BT_IPMI_BMC
depends on ARCH_ASPEED || COMPILE_TEST
depends on REGMAP && REGMAP_MMIO && MFD_SYSCON
diff --git a/drivers/char/ipmi/Makefile b/drivers/char/ipmi/Makefile
index 33b899fcf14a..21e9e872d973 100644
--- a/drivers/char/ipmi/Makefile
+++ b/drivers/char/ipmi/Makefile
@@ -21,4 +21,6 @@ obj-$(CONFIG_IPMI_SSIF) += ipmi_ssif.o
obj-$(CONFIG_IPMI_POWERNV) += ipmi_powernv.o
obj-$(CONFIG_IPMI_WATCHDOG) += ipmi_watchdog.o
obj-$(CONFIG_IPMI_POWEROFF) += ipmi_poweroff.o
+obj-$(CONFIG_IPMI_KCS_BMC) += kcs_bmc.o
obj-$(CONFIG_ASPEED_BT_IPMI_BMC) += bt-bmc.o
+obj-$(CONFIG_ASPEED_KCS_IPMI_BMC) += kcs_bmc_aspeed.o
diff --git a/drivers/char/ipmi/bt-bmc.c b/drivers/char/ipmi/bt-bmc.c
index c95b93b7598b..40b9927c072c 100644
--- a/drivers/char/ipmi/bt-bmc.c
+++ b/drivers/char/ipmi/bt-bmc.c
@@ -1,10 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2015-2016, IBM Corporation.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/atomic.h>
diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c
index feafdab734ae..fd4ea8d87d4b 100644
--- a/drivers/char/ipmi/ipmi_bt_sm.c
+++ b/drivers/char/ipmi/ipmi_bt_sm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_bt_sm.c
*
@@ -5,26 +6,7 @@
* of the driver architecture at http://sourceforge.net/projects/openipmi
*
* Author: Rocky Craig <first.last@hp.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA. */
+ */
#include <linux/kernel.h> /* For printk. */
#include <linux/string.h>
diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index 5f1bc9174735..8ecfd47806fa 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_devintf.c
*
@@ -8,27 +9,6 @@
* source@mvista.com
*
* Copyright 2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
diff --git a/drivers/char/ipmi/ipmi_dmi.c b/drivers/char/ipmi/ipmi_dmi.c
index c5112b17d7ea..e2c143861b1e 100644
--- a/drivers/char/ipmi/ipmi_dmi.c
+++ b/drivers/char/ipmi/ipmi_dmi.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0+
/*
* A hack to create a platform device from a DMI entry. This will
* allow autoloading of the IPMI drive based on SMBIOS entries.
@@ -29,15 +29,6 @@ static struct ipmi_dmi_info *ipmi_dmi_infos;
static int ipmi_dmi_nr __initdata;
-#define set_prop_entry(_p_, _name_, type, val) \
-do { \
- struct property_entry *_p = &_p_; \
- _p->name = _name_; \
- _p->length = sizeof(type); \
- _p->is_string = false; \
- _p->value.type##_data = val; \
-} while(0)
-
static void __init dmi_add_platform_ipmi(unsigned long base_addr,
u32 flags,
u8 slave_addr,
@@ -85,9 +76,10 @@ static void __init dmi_add_platform_ipmi(unsigned long base_addr,
}
if (si_type != SI_TYPE_INVALID)
- set_prop_entry(p[pidx++], "ipmi-type", u8, si_type);
- set_prop_entry(p[pidx++], "slave-addr", u8, slave_addr);
- set_prop_entry(p[pidx++], "addr-source", u8, SI_SMBIOS);
+ p[pidx++] = PROPERTY_ENTRY_U8("ipmi-type", si_type);
+
+ p[pidx++] = PROPERTY_ENTRY_U8("slave-addr", slave_addr);
+ p[pidx++] = PROPERTY_ENTRY_U8("addr-source", SI_SMBIOS);
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
@@ -112,7 +104,7 @@ static void __init dmi_add_platform_ipmi(unsigned long base_addr,
goto err;
if (type == IPMI_DMI_TYPE_SSIF) {
- set_prop_entry(p[pidx++], "i2c-addr", u16, base_addr);
+ p[pidx++] = PROPERTY_ENTRY_U16("i2c-addr", base_addr);
goto add_properties;
}
diff --git a/drivers/char/ipmi/ipmi_dmi.h b/drivers/char/ipmi/ipmi_dmi.h
index 6c21018e3668..8d2b094db8e6 100644
--- a/drivers/char/ipmi/ipmi_dmi.h
+++ b/drivers/char/ipmi/ipmi_dmi.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* DMI defines for use by IPMI
*/
diff --git a/drivers/char/ipmi/ipmi_kcs_sm.c b/drivers/char/ipmi/ipmi_kcs_sm.c
index 1da61af7f576..f4ea9f47230a 100644
--- a/drivers/char/ipmi/ipmi_kcs_sm.c
+++ b/drivers/char/ipmi/ipmi_kcs_sm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_kcs_sm.c
*
@@ -8,27 +9,6 @@
* source@mvista.com
*
* Copyright 2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index e0b0d7e2d976..361148938801 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_msghandler.c
*
@@ -8,27 +9,6 @@
* source@mvista.com
*
* Copyright 2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
diff --git a/drivers/char/ipmi/ipmi_powernv.c b/drivers/char/ipmi/ipmi_powernv.c
index bcf493d8e238..e96500372ce2 100644
--- a/drivers/char/ipmi/ipmi_powernv.c
+++ b/drivers/char/ipmi/ipmi_powernv.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* PowerNV OPAL IPMI driver
*
* Copyright 2014 IBM Corp.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
*/
#define pr_fmt(fmt) "ipmi-powernv: " fmt
diff --git a/drivers/char/ipmi/ipmi_poweroff.c b/drivers/char/ipmi/ipmi_poweroff.c
index 38e6af1c8e38..7996337852f2 100644
--- a/drivers/char/ipmi/ipmi_poweroff.c
+++ b/drivers/char/ipmi/ipmi_poweroff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_poweroff.c
*
@@ -9,27 +10,6 @@
* source@mvista.com
*
* Copyright 2002,2004 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -457,6 +437,24 @@ static int ipmi_dell_chassis_detect(ipmi_user_t user)
}
/*
+ * ipmi_hp_chassis_detect()
+ * HP PA-RISC servers rp3410/rp3440, the C8000 workstation and the rx2600 and
+ * zx6000 machines support IPMI vers 1 and don't set the chassis capability bit
+ * but they can handle a chassis poweroff or powercycle command.
+ */
+
+#define HP_IANA_MFR_ID 0x0b
+#define HP_BMC_PROD_ID 0x8201
+static int ipmi_hp_chassis_detect(ipmi_user_t user)
+{
+ if (mfg_id == HP_IANA_MFR_ID
+ && prod_id == HP_BMC_PROD_ID
+ && ipmi_version == 1)
+ return 1;
+ return 0;
+}
+
+/*
* Standard chassis support
*/
@@ -533,14 +531,16 @@ static struct poweroff_function poweroff_functions[] = {
{ .platform_type = "chassis",
.detect = ipmi_dell_chassis_detect,
.poweroff_func = ipmi_poweroff_chassis },
+ { .platform_type = "chassis",
+ .detect = ipmi_hp_chassis_detect,
+ .poweroff_func = ipmi_poweroff_chassis },
/* Chassis should generally be last, other things should override
it. */
{ .platform_type = "chassis",
.detect = ipmi_chassis_detect,
.poweroff_func = ipmi_poweroff_chassis },
};
-#define NUM_PO_FUNCS (sizeof(poweroff_functions) \
- / sizeof(struct poweroff_function))
+#define NUM_PO_FUNCS ARRAY_SIZE(poweroff_functions)
/* Called on a powerdown request. */
diff --git a/drivers/char/ipmi/ipmi_si.h b/drivers/char/ipmi/ipmi_si.h
index 17ce5f7b89ab..52f6152d1fcb 100644
--- a/drivers/char/ipmi/ipmi_si.h
+++ b/drivers/char/ipmi/ipmi_si.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* ipmi_si.h
*
diff --git a/drivers/char/ipmi/ipmi_si_hardcode.c b/drivers/char/ipmi/ipmi_si_hardcode.c
index fa9a4780de36..10219f24546b 100644
--- a/drivers/char/ipmi/ipmi_si_hardcode.c
+++ b/drivers/char/ipmi/ipmi_si_hardcode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
#include <linux/moduleparam.h>
#include "ipmi_si.h"
diff --git a/drivers/char/ipmi/ipmi_si_hotmod.c b/drivers/char/ipmi/ipmi_si_hotmod.c
index fc03b9be2f3d..a98ca42a50b1 100644
--- a/drivers/char/ipmi/ipmi_si_hotmod.c
+++ b/drivers/char/ipmi/ipmi_si_hotmod.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_si_hotmod.c
*
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 6768cb2dd740..ff870aa91cfe 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_si.c
*
@@ -10,27 +11,6 @@
*
* Copyright 2002 MontaVista Software Inc.
* Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
@@ -252,6 +232,12 @@ struct smi_info {
/* Default driver model device. */
struct platform_device *pdev;
+ /* Have we added the device group to the device? */
+ bool dev_group_added;
+
+ /* Have we added the platform device? */
+ bool pdev_registered;
+
/* Counters and things for the proc filesystem. */
atomic_t stats[SI_NUM_STATS];
@@ -275,7 +261,8 @@ static int num_max_busy_us;
static bool unload_when_empty = true;
static int try_smi_init(struct smi_info *smi);
-static void cleanup_one_si(struct smi_info *to_clean);
+static void shutdown_one_si(struct smi_info *smi_info);
+static void cleanup_one_si(struct smi_info *smi_info);
static void cleanup_ipmi_si(void);
#ifdef DEBUG_TIMING
@@ -2017,18 +2004,13 @@ int ipmi_si_add_smi(struct si_sm_io *io)
ipmi_addr_src_to_str(new_smi->io.addr_source),
si_to_str[new_smi->io.si_type]);
- /* So we know not to free it unless we have allocated one. */
- new_smi->intf = NULL;
- new_smi->si_sm = NULL;
- new_smi->handlers = NULL;
-
list_add_tail(&new_smi->link, &smi_infos);
if (initialized) {
rv = try_smi_init(new_smi);
if (rv) {
- mutex_unlock(&smi_infos_lock);
cleanup_one_si(new_smi);
+ mutex_unlock(&smi_infos_lock);
return rv;
}
}
@@ -2047,7 +2029,6 @@ static int try_smi_init(struct smi_info *new_smi)
int rv = 0;
int i;
char *init_name = NULL;
- bool platform_device_registered = false;
pr_info(PFX "Trying %s-specified %s state machine at %s address 0x%lx, slave address 0x%x, irq %d\n",
ipmi_addr_src_to_str(new_smi->io.addr_source),
@@ -2090,6 +2071,7 @@ static int try_smi_init(struct smi_info *new_smi)
new_smi->intf_num);
if (!new_smi->pdev) {
pr_err(PFX "Unable to allocate platform device\n");
+ rv = -ENOMEM;
goto out_err;
}
new_smi->io.dev = &new_smi->pdev->dev;
@@ -2168,7 +2150,7 @@ static int try_smi_init(struct smi_info *new_smi)
atomic_set(&new_smi->req_events, 1);
}
- if (new_smi->pdev) {
+ if (new_smi->pdev && !new_smi->pdev_registered) {
rv = platform_device_add(new_smi->pdev);
if (rv) {
dev_err(new_smi->io.dev,
@@ -2176,7 +2158,7 @@ static int try_smi_init(struct smi_info *new_smi)
rv);
goto out_err;
}
- platform_device_registered = true;
+ new_smi->pdev_registered = true;
}
dev_set_drvdata(new_smi->io.dev, new_smi);
@@ -2185,8 +2167,9 @@ static int try_smi_init(struct smi_info *new_smi)
dev_err(new_smi->io.dev,
"Unable to add device attributes: error %d\n",
rv);
- goto out_err_stop_timer;
+ goto out_err;
}
+ new_smi->dev_group_added = true;
rv = ipmi_register_smi(&handlers,
new_smi,
@@ -2196,7 +2179,7 @@ static int try_smi_init(struct smi_info *new_smi)
dev_err(new_smi->io.dev,
"Unable to register device: error %d\n",
rv);
- goto out_err_remove_attrs;
+ goto out_err;
}
#ifdef CONFIG_IPMI_PROC_INTERFACE
@@ -2206,7 +2189,7 @@ static int try_smi_init(struct smi_info *new_smi)
if (rv) {
dev_err(new_smi->io.dev,
"Unable to create proc entry: %d\n", rv);
- goto out_err_stop_timer;
+ goto out_err;
}
rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
@@ -2215,7 +2198,7 @@ static int try_smi_init(struct smi_info *new_smi)
if (rv) {
dev_err(new_smi->io.dev,
"Unable to create proc entry: %d\n", rv);
- goto out_err_stop_timer;
+ goto out_err;
}
rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
@@ -2224,7 +2207,7 @@ static int try_smi_init(struct smi_info *new_smi)
if (rv) {
dev_err(new_smi->io.dev,
"Unable to create proc entry: %d\n", rv);
- goto out_err_stop_timer;
+ goto out_err;
}
#endif
@@ -2239,56 +2222,8 @@ static int try_smi_init(struct smi_info *new_smi)
return 0;
-out_err_remove_attrs:
- device_remove_group(new_smi->io.dev, &ipmi_si_dev_attr_group);
- dev_set_drvdata(new_smi->io.dev, NULL);
-
-out_err_stop_timer:
- stop_timer_and_thread(new_smi);
-
out_err:
- new_smi->interrupt_disabled = true;
-
- if (new_smi->intf) {
- ipmi_smi_t intf = new_smi->intf;
- new_smi->intf = NULL;
- ipmi_unregister_smi(intf);
- }
-
- if (new_smi->io.irq_cleanup) {
- new_smi->io.irq_cleanup(&new_smi->io);
- new_smi->io.irq_cleanup = NULL;
- }
-
- /*
- * Wait until we know that we are out of any interrupt
- * handlers might have been running before we freed the
- * interrupt.
- */
- synchronize_sched();
-
- if (new_smi->si_sm) {
- if (new_smi->handlers)
- new_smi->handlers->cleanup(new_smi->si_sm);
- kfree(new_smi->si_sm);
- new_smi->si_sm = NULL;
- }
- if (new_smi->io.addr_source_cleanup) {
- new_smi->io.addr_source_cleanup(&new_smi->io);
- new_smi->io.addr_source_cleanup = NULL;
- }
- if (new_smi->io.io_cleanup) {
- new_smi->io.io_cleanup(&new_smi->io);
- new_smi->io.io_cleanup = NULL;
- }
-
- if (new_smi->pdev) {
- if (platform_device_registered)
- platform_device_unregister(new_smi->pdev);
- else
- platform_device_put(new_smi->pdev);
- new_smi->pdev = NULL;
- }
+ shutdown_one_si(new_smi);
kfree(init_name);
@@ -2366,17 +2301,14 @@ skip_fallback_noirq:
}
module_init(init_ipmi_si);
-static void cleanup_one_si(struct smi_info *to_clean)
+static void shutdown_one_si(struct smi_info *smi_info)
{
int rv = 0;
- if (!to_clean)
- return;
-
- if (to_clean->intf) {
- ipmi_smi_t intf = to_clean->intf;
+ if (smi_info->intf) {
+ ipmi_smi_t intf = smi_info->intf;
- to_clean->intf = NULL;
+ smi_info->intf = NULL;
rv = ipmi_unregister_smi(intf);
if (rv) {
pr_err(PFX "Unable to unregister device: errno=%d\n",
@@ -2384,49 +2316,79 @@ static void cleanup_one_si(struct smi_info *to_clean)
}
}
- device_remove_group(to_clean->io.dev, &ipmi_si_dev_attr_group);
- dev_set_drvdata(to_clean->io.dev, NULL);
-
- list_del(&to_clean->link);
+ if (smi_info->dev_group_added) {
+ device_remove_group(smi_info->io.dev, &ipmi_si_dev_attr_group);
+ smi_info->dev_group_added = false;
+ }
+ if (smi_info->io.dev)
+ dev_set_drvdata(smi_info->io.dev, NULL);
/*
* Make sure that interrupts, the timer and the thread are
* stopped and will not run again.
*/
- if (to_clean->io.irq_cleanup)
- to_clean->io.irq_cleanup(&to_clean->io);
- stop_timer_and_thread(to_clean);
+ smi_info->interrupt_disabled = true;
+ if (smi_info->io.irq_cleanup) {
+ smi_info->io.irq_cleanup(&smi_info->io);
+ smi_info->io.irq_cleanup = NULL;
+ }
+ stop_timer_and_thread(smi_info);
+
+ /*
+ * Wait until we know that we are out of any interrupt
+ * handlers might have been running before we freed the
+ * interrupt.
+ */
+ synchronize_sched();
/*
* Timeouts are stopped, now make sure the interrupts are off
* in the BMC. Note that timers and CPU interrupts are off,
* so no need for locks.
*/
- while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
- poll(to_clean);
+ while (smi_info->curr_msg || (smi_info->si_state != SI_NORMAL)) {
+ poll(smi_info);
schedule_timeout_uninterruptible(1);
}
- if (to_clean->handlers)
- disable_si_irq(to_clean);
- while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
- poll(to_clean);
+ if (smi_info->handlers)
+ disable_si_irq(smi_info);
+ while (smi_info->curr_msg || (smi_info->si_state != SI_NORMAL)) {
+ poll(smi_info);
schedule_timeout_uninterruptible(1);
}
+ if (smi_info->handlers)
+ smi_info->handlers->cleanup(smi_info->si_sm);
+
+ if (smi_info->io.addr_source_cleanup) {
+ smi_info->io.addr_source_cleanup(&smi_info->io);
+ smi_info->io.addr_source_cleanup = NULL;
+ }
+ if (smi_info->io.io_cleanup) {
+ smi_info->io.io_cleanup(&smi_info->io);
+ smi_info->io.io_cleanup = NULL;
+ }
- if (to_clean->handlers)
- to_clean->handlers->cleanup(to_clean->si_sm);
+ kfree(smi_info->si_sm);
+ smi_info->si_sm = NULL;
+}
- kfree(to_clean->si_sm);
+static void cleanup_one_si(struct smi_info *smi_info)
+{
+ if (!smi_info)
+ return;
- if (to_clean->io.addr_source_cleanup)
- to_clean->io.addr_source_cleanup(&to_clean->io);
- if (to_clean->io.io_cleanup)
- to_clean->io.io_cleanup(&to_clean->io);
+ list_del(&smi_info->link);
- if (to_clean->pdev)
- platform_device_unregister(to_clean->pdev);
+ shutdown_one_si(smi_info);
+
+ if (smi_info->pdev) {
+ if (smi_info->pdev_registered)
+ platform_device_unregister(smi_info->pdev);
+ else
+ platform_device_put(smi_info->pdev);
+ }
- kfree(to_clean);
+ kfree(smi_info);
}
int ipmi_si_remove_by_dev(struct device *dev)
diff --git a/drivers/char/ipmi/ipmi_si_mem_io.c b/drivers/char/ipmi/ipmi_si_mem_io.c
index 8796396ecd0f..1b869d530884 100644
--- a/drivers/char/ipmi/ipmi_si_mem_io.c
+++ b/drivers/char/ipmi/ipmi_si_mem_io.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
#include <linux/io.h>
#include "ipmi_si.h"
diff --git a/drivers/char/ipmi/ipmi_si_parisc.c b/drivers/char/ipmi/ipmi_si_parisc.c
index 6b10f0e18a95..f3c99820f564 100644
--- a/drivers/char/ipmi/ipmi_si_parisc.c
+++ b/drivers/char/ipmi/ipmi_si_parisc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
#include <linux/module.h>
#include <asm/hardware.h> /* for register_parisc_driver() stuff */
diff --git a/drivers/char/ipmi/ipmi_si_pci.c b/drivers/char/ipmi/ipmi_si_pci.c
index 27dd11c49d21..f54ca6869ed2 100644
--- a/drivers/char/ipmi/ipmi_si_pci.c
+++ b/drivers/char/ipmi/ipmi_si_pci.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_si_pci.c
*
@@ -17,16 +18,12 @@ module_param_named(trypci, si_trypci, bool, 0);
MODULE_PARM_DESC(trypci, "Setting this to zero will disable the"
" default scan of the interfaces identified via pci");
-#define PCI_ERMC_CLASSCODE 0x0C0700
-#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
-#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
-#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
-#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
-#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
+#define PCI_CLASS_SERIAL_IPMI 0x0c07
+#define PCI_CLASS_SERIAL_IPMI_SMIC 0x0c0700
+#define PCI_CLASS_SERIAL_IPMI_KCS 0x0c0701
+#define PCI_CLASS_SERIAL_IPMI_BT 0x0c0702
-#define PCI_HP_VENDOR_ID 0x103C
-#define PCI_MMC_DEVICE_ID 0x121A
-#define PCI_MMC_ADDR_CW 0x10
+#define PCI_DEVICE_ID_HP_MMC 0x121A
static void ipmi_pci_cleanup(struct si_sm_io *io)
{
@@ -65,32 +62,43 @@ static int ipmi_pci_probe_regspacing(struct si_sm_io *io)
return DEFAULT_REGSPACING;
}
+static struct pci_device_id ipmi_pci_blacklist[] = {
+ /*
+ * This is a "Virtual IPMI device", whatever that is. It appears
+ * as a KCS device by the class, but it is not one.
+ */
+ { PCI_VDEVICE(REALTEK, 0x816c) },
+ { 0, }
+};
+
static int ipmi_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int rv;
- int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
struct si_sm_io io;
+ if (pci_match_id(ipmi_pci_blacklist, pdev))
+ return -ENODEV;
+
memset(&io, 0, sizeof(io));
io.addr_source = SI_PCI;
dev_info(&pdev->dev, "probing via PCI");
- switch (class_type) {
- case PCI_ERMC_CLASSCODE_TYPE_SMIC:
+ switch (pdev->class) {
+ case PCI_CLASS_SERIAL_IPMI_SMIC:
io.si_type = SI_SMIC;
break;
- case PCI_ERMC_CLASSCODE_TYPE_KCS:
+ case PCI_CLASS_SERIAL_IPMI_KCS:
io.si_type = SI_KCS;
break;
- case PCI_ERMC_CLASSCODE_TYPE_BT:
+ case PCI_CLASS_SERIAL_IPMI_BT:
io.si_type = SI_BT;
break;
default:
- dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
+ dev_info(&pdev->dev, "Unknown IPMI class: %x\n", pdev->class);
return -ENOMEM;
}
@@ -138,8 +146,10 @@ static void ipmi_pci_remove(struct pci_dev *pdev)
}
static const struct pci_device_id ipmi_pci_devices[] = {
- { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
- { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
+ { PCI_VDEVICE(HP, PCI_DEVICE_ID_HP_MMC) },
+ { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_IPMI_SMIC, ~0) },
+ { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_IPMI_KCS, ~0) },
+ { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_IPMI_BT, ~0) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
diff --git a/drivers/char/ipmi/ipmi_si_platform.c b/drivers/char/ipmi/ipmi_si_platform.c
index f4214870d726..bf69927502bd 100644
--- a/drivers/char/ipmi/ipmi_si_platform.c
+++ b/drivers/char/ipmi/ipmi_si_platform.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_si_platform.c
*
@@ -50,14 +51,6 @@ MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
#endif
#ifdef CONFIG_ACPI
-
-/*
- * Once we get an ACPI failure, we don't try any more, because we go
- * through the tables sequentially. Once we don't find a table, there
- * are no more.
- */
-static int acpi_failure;
-
/* For GPE-type interrupts. */
static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
u32 gpe_number, void *context)
@@ -102,146 +95,6 @@ static int acpi_gpe_irq_setup(struct si_sm_io *io)
return 0;
}
}
-
-/*
- * Defined at
- * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
- */
-struct SPMITable {
- s8 Signature[4];
- u32 Length;
- u8 Revision;
- u8 Checksum;
- s8 OEMID[6];
- s8 OEMTableID[8];
- s8 OEMRevision[4];
- s8 CreatorID[4];
- s8 CreatorRevision[4];
- u8 InterfaceType;
- u8 IPMIlegacy;
- s16 SpecificationRevision;
-
- /*
- * Bit 0 - SCI interrupt supported
- * Bit 1 - I/O APIC/SAPIC
- */
- u8 InterruptType;
-
- /*
- * If bit 0 of InterruptType is set, then this is the SCI
- * interrupt in the GPEx_STS register.
- */
- u8 GPE;
-
- s16 Reserved;
-
- /*
- * If bit 1 of InterruptType is set, then this is the I/O
- * APIC/SAPIC interrupt.
- */
- u32 GlobalSystemInterrupt;
-
- /* The actual register address. */
- struct acpi_generic_address addr;
-
- u8 UID[4];
-
- s8 spmi_id[1]; /* A '\0' terminated array starts here. */
-};
-
-static int try_init_spmi(struct SPMITable *spmi)
-{
- struct si_sm_io io;
-
- if (spmi->IPMIlegacy != 1) {
- pr_info(PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
- return -ENODEV;
- }
-
- memset(&io, 0, sizeof(io));
- io.addr_source = SI_SPMI;
- pr_info(PFX "probing via SPMI\n");
-
- /* Figure out the interface type. */
- switch (spmi->InterfaceType) {
- case 1: /* KCS */
- io.si_type = SI_KCS;
- break;
- case 2: /* SMIC */
- io.si_type = SI_SMIC;
- break;
- case 3: /* BT */
- io.si_type = SI_BT;
- break;
- case 4: /* SSIF, just ignore */
- return -EIO;
- default:
- pr_info(PFX "Unknown ACPI/SPMI SI type %d\n",
- spmi->InterfaceType);
- return -EIO;
- }
-
- if (spmi->InterruptType & 1) {
- /* We've got a GPE interrupt. */
- io.irq = spmi->GPE;
- io.irq_setup = acpi_gpe_irq_setup;
- } else if (spmi->InterruptType & 2) {
- /* We've got an APIC/SAPIC interrupt. */
- io.irq = spmi->GlobalSystemInterrupt;
- io.irq_setup = ipmi_std_irq_setup;
- } else {
- /* Use the default interrupt setting. */
- io.irq = 0;
- io.irq_setup = NULL;
- }
-
- if (spmi->addr.bit_width) {
- /* A (hopefully) properly formed register bit width. */
- io.regspacing = spmi->addr.bit_width / 8;
- } else {
- io.regspacing = DEFAULT_REGSPACING;
- }
- io.regsize = io.regspacing;
- io.regshift = spmi->addr.bit_offset;
-
- if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
- io.addr_type = IPMI_MEM_ADDR_SPACE;
- } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
- io.addr_type = IPMI_IO_ADDR_SPACE;
- } else {
- pr_warn(PFX "Unknown ACPI I/O Address type\n");
- return -EIO;
- }
- io.addr_data = spmi->addr.address;
-
- pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
- (io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
- io.addr_data, io.regsize, io.regspacing, io.irq);
-
- return ipmi_si_add_smi(&io);
-}
-
-static void spmi_find_bmc(void)
-{
- acpi_status status;
- struct SPMITable *spmi;
- int i;
-
- if (acpi_disabled)
- return;
-
- if (acpi_failure)
- return;
-
- for (i = 0; ; i++) {
- status = acpi_get_table(ACPI_SIG_SPMI, i+1,
- (struct acpi_table_header **)&spmi);
- if (status != AE_OK)
- return;
-
- try_init_spmi(spmi);
- }
-}
#endif
static struct resource *
@@ -579,12 +432,6 @@ void ipmi_si_platform_init(void)
int rv = platform_driver_register(&ipmi_platform_driver);
if (rv)
pr_err(PFX "Unable to register driver: %d\n", rv);
-
-#ifdef CONFIG_ACPI
- if (si_tryacpi)
- spmi_find_bmc();
-#endif
-
}
void ipmi_si_platform_shutdown(void)
diff --git a/drivers/char/ipmi/ipmi_si_port_io.c b/drivers/char/ipmi/ipmi_si_port_io.c
index e5ce174fbeeb..ef6dffcea9fa 100644
--- a/drivers/char/ipmi/ipmi_si_port_io.c
+++ b/drivers/char/ipmi/ipmi_si_port_io.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
#include <linux/io.h>
#include "ipmi_si.h"
diff --git a/drivers/char/ipmi/ipmi_si_sm.h b/drivers/char/ipmi/ipmi_si_sm.h
index aa8d88ab4433..aaddf047d923 100644
--- a/drivers/char/ipmi/ipmi_si_sm.h
+++ b/drivers/char/ipmi/ipmi_si_sm.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* ipmi_si_sm.h
*
@@ -11,27 +12,6 @@
* source@mvista.com
*
* Copyright 2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/ipmi.h>
diff --git a/drivers/char/ipmi/ipmi_smic_sm.c b/drivers/char/ipmi/ipmi_smic_sm.c
index 8f7c73ff58f2..466a5aac5298 100644
--- a/drivers/char/ipmi/ipmi_smic_sm.c
+++ b/drivers/char/ipmi/ipmi_smic_sm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_smic_sm.c
*
@@ -18,28 +19,7 @@
* copyright notice:
* (c) Copyright 2001 Grant Grundler (c) Copyright
* 2001 Hewlett-Packard Company
- *
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA. */
+ */
#include <linux/kernel.h> /* For printk. */
#include <linux/string.h>
diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index f929e72bdac8..35a82f4bfd78 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_ssif.c
*
@@ -13,11 +14,6 @@
*
* Copyright 2003 Intel Corporation
* Copyright 2005 MontaVista Software
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
*/
/*
@@ -761,7 +757,7 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
ssif_info->ssif_state = SSIF_NORMAL;
ipmi_ssif_unlock_cond(ssif_info, flags);
pr_warn(PFX "Error getting flags: %d %d, %x\n",
- result, len, data[2]);
+ result, len, (len >= 3) ? data[2] : 0);
} else if (data[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
|| data[1] != IPMI_GET_MSG_FLAGS_CMD) {
/*
@@ -783,7 +779,7 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
if ((result < 0) || (len < 3) || (data[2] != 0)) {
/* Error clearing flags */
pr_warn(PFX "Error clearing flags: %d %d, %x\n",
- result, len, data[2]);
+ result, len, (len >= 3) ? data[2] : 0);
} else if (data[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2
|| data[1] != IPMI_CLEAR_MSG_FLAGS_CMD) {
pr_warn(PFX "Invalid response clearing flags: %x %x\n",
@@ -1906,108 +1902,6 @@ static const struct acpi_device_id ssif_acpi_match[] = {
{ },
};
MODULE_DEVICE_TABLE(acpi, ssif_acpi_match);
-
-/*
- * Once we get an ACPI failure, we don't try any more, because we go
- * through the tables sequentially. Once we don't find a table, there
- * are no more.
- */
-static int acpi_failure;
-
-/*
- * Defined in the IPMI 2.0 spec.
- */
-struct SPMITable {
- s8 Signature[4];
- u32 Length;
- u8 Revision;
- u8 Checksum;
- s8 OEMID[6];
- s8 OEMTableID[8];
- s8 OEMRevision[4];
- s8 CreatorID[4];
- s8 CreatorRevision[4];
- u8 InterfaceType;
- u8 IPMIlegacy;
- s16 SpecificationRevision;
-
- /*
- * Bit 0 - SCI interrupt supported
- * Bit 1 - I/O APIC/SAPIC
- */
- u8 InterruptType;
-
- /*
- * If bit 0 of InterruptType is set, then this is the SCI
- * interrupt in the GPEx_STS register.
- */
- u8 GPE;
-
- s16 Reserved;
-
- /*
- * If bit 1 of InterruptType is set, then this is the I/O
- * APIC/SAPIC interrupt.
- */
- u32 GlobalSystemInterrupt;
-
- /* The actual register address. */
- struct acpi_generic_address addr;
-
- u8 UID[4];
-
- s8 spmi_id[1]; /* A '\0' terminated array starts here. */
-};
-
-static int try_init_spmi(struct SPMITable *spmi)
-{
- unsigned short myaddr;
-
- if (num_addrs >= MAX_SSIF_BMCS)
- return -1;
-
- if (spmi->IPMIlegacy != 1) {
- pr_warn("IPMI: Bad SPMI legacy: %d\n", spmi->IPMIlegacy);
- return -ENODEV;
- }
-
- if (spmi->InterfaceType != 4)
- return -ENODEV;
-
- if (spmi->addr.space_id != ACPI_ADR_SPACE_SMBUS) {
- pr_warn(PFX "Invalid ACPI SSIF I/O Address type: %d\n",
- spmi->addr.space_id);
- return -EIO;
- }
-
- myaddr = spmi->addr.address & 0x7f;
-
- return new_ssif_client(myaddr, NULL, 0, 0, SI_SPMI, NULL);
-}
-
-static void spmi_find_bmc(void)
-{
- acpi_status status;
- struct SPMITable *spmi;
- int i;
-
- if (acpi_disabled)
- return;
-
- if (acpi_failure)
- return;
-
- for (i = 0; ; i++) {
- status = acpi_get_table(ACPI_SIG_SPMI, i+1,
- (struct acpi_table_header **)&spmi);
- if (status != AE_OK)
- return;
-
- try_init_spmi(spmi);
- }
-}
-#else
-static void spmi_find_bmc(void) { }
#endif
#ifdef CONFIG_DMI
@@ -2112,9 +2006,6 @@ static int init_ipmi_ssif(void)
ssif_i2c_driver.driver.acpi_match_table =
ACPI_PTR(ssif_acpi_match);
- if (ssif_tryacpi)
- spmi_find_bmc();
-
if (ssif_trydmi) {
rv = platform_driver_register(&ipmi_driver);
if (rv)
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index a58acdcf7414..22bc287eac2d 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* ipmi_watchdog.c
*
@@ -8,27 +9,6 @@
* source@mvista.com
*
* Copyright 2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
diff --git a/drivers/char/ipmi/kcs_bmc.c b/drivers/char/ipmi/kcs_bmc.c
new file mode 100644
index 000000000000..fbfc05e3f3d1
--- /dev/null
+++ b/drivers/char/ipmi/kcs_bmc.c
@@ -0,0 +1,467 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2015-2018, Intel Corporation.
+ */
+
+#define pr_fmt(fmt) "kcs-bmc: " fmt
+
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/ipmi_bmc.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include "kcs_bmc.h"
+
+#define KCS_MSG_BUFSIZ 1000
+
+#define KCS_ZERO_DATA 0
+
+
+/* IPMI 2.0 - Table 9-1, KCS Interface Status Register Bits */
+#define KCS_STATUS_STATE(state) (state << 6)
+#define KCS_STATUS_STATE_MASK GENMASK(7, 6)
+#define KCS_STATUS_CMD_DAT BIT(3)
+#define KCS_STATUS_SMS_ATN BIT(2)
+#define KCS_STATUS_IBF BIT(1)
+#define KCS_STATUS_OBF BIT(0)
+
+/* IPMI 2.0 - Table 9-2, KCS Interface State Bits */
+enum kcs_states {
+ IDLE_STATE = 0,
+ READ_STATE = 1,
+ WRITE_STATE = 2,
+ ERROR_STATE = 3,
+};
+
+/* IPMI 2.0 - Table 9-3, KCS Interface Control Codes */
+#define KCS_CMD_GET_STATUS_ABORT 0x60
+#define KCS_CMD_WRITE_START 0x61
+#define KCS_CMD_WRITE_END 0x62
+#define KCS_CMD_READ_BYTE 0x68
+
+static inline u8 read_data(struct kcs_bmc *kcs_bmc)
+{
+ return kcs_bmc->io_inputb(kcs_bmc, kcs_bmc->ioreg.idr);
+}
+
+static inline void write_data(struct kcs_bmc *kcs_bmc, u8 data)
+{
+ kcs_bmc->io_outputb(kcs_bmc, kcs_bmc->ioreg.odr, data);
+}
+
+static inline u8 read_status(struct kcs_bmc *kcs_bmc)
+{
+ return kcs_bmc->io_inputb(kcs_bmc, kcs_bmc->ioreg.str);
+}
+
+static inline void write_status(struct kcs_bmc *kcs_bmc, u8 data)
+{
+ kcs_bmc->io_outputb(kcs_bmc, kcs_bmc->ioreg.str, data);
+}
+
+static void update_status_bits(struct kcs_bmc *kcs_bmc, u8 mask, u8 val)
+{
+ u8 tmp = read_status(kcs_bmc);
+
+ tmp &= ~mask;
+ tmp |= val & mask;
+
+ write_status(kcs_bmc, tmp);
+}
+
+static inline void set_state(struct kcs_bmc *kcs_bmc, u8 state)
+{
+ update_status_bits(kcs_bmc, KCS_STATUS_STATE_MASK,
+ KCS_STATUS_STATE(state));
+}
+
+static void kcs_force_abort(struct kcs_bmc *kcs_bmc)
+{
+ set_state(kcs_bmc, ERROR_STATE);
+ read_data(kcs_bmc);
+ write_data(kcs_bmc, KCS_ZERO_DATA);
+
+ kcs_bmc->phase = KCS_PHASE_ERROR;
+ kcs_bmc->data_in_avail = false;
+ kcs_bmc->data_in_idx = 0;
+}
+
+static void kcs_bmc_handle_data(struct kcs_bmc *kcs_bmc)
+{
+ u8 data;
+
+ switch (kcs_bmc->phase) {
+ case KCS_PHASE_WRITE_START:
+ kcs_bmc->phase = KCS_PHASE_WRITE_DATA;
+ /* fall through */
+
+ case KCS_PHASE_WRITE_DATA:
+ if (kcs_bmc->data_in_idx < KCS_MSG_BUFSIZ) {
+ set_state(kcs_bmc, WRITE_STATE);
+ write_data(kcs_bmc, KCS_ZERO_DATA);
+ kcs_bmc->data_in[kcs_bmc->data_in_idx++] =
+ read_data(kcs_bmc);
+ } else {
+ kcs_force_abort(kcs_bmc);
+ kcs_bmc->error = KCS_LENGTH_ERROR;
+ }
+ break;
+
+ case KCS_PHASE_WRITE_END_CMD:
+ if (kcs_bmc->data_in_idx < KCS_MSG_BUFSIZ) {
+ set_state(kcs_bmc, READ_STATE);
+ kcs_bmc->data_in[kcs_bmc->data_in_idx++] =
+ read_data(kcs_bmc);
+ kcs_bmc->phase = KCS_PHASE_WRITE_DONE;
+ kcs_bmc->data_in_avail = true;
+ wake_up_interruptible(&kcs_bmc->queue);
+ } else {
+ kcs_force_abort(kcs_bmc);
+ kcs_bmc->error = KCS_LENGTH_ERROR;
+ }
+ break;
+
+ case KCS_PHASE_READ:
+ if (kcs_bmc->data_out_idx == kcs_bmc->data_out_len)
+ set_state(kcs_bmc, IDLE_STATE);
+
+ data = read_data(kcs_bmc);
+ if (data != KCS_CMD_READ_BYTE) {
+ set_state(kcs_bmc, ERROR_STATE);
+ write_data(kcs_bmc, KCS_ZERO_DATA);
+ break;
+ }
+
+ if (kcs_bmc->data_out_idx == kcs_bmc->data_out_len) {
+ write_data(kcs_bmc, KCS_ZERO_DATA);
+ kcs_bmc->phase = KCS_PHASE_IDLE;
+ break;
+ }
+
+ write_data(kcs_bmc,
+ kcs_bmc->data_out[kcs_bmc->data_out_idx++]);
+ break;
+
+ case KCS_PHASE_ABORT_ERROR1:
+ set_state(kcs_bmc, READ_STATE);
+ read_data(kcs_bmc);
+ write_data(kcs_bmc, kcs_bmc->error);
+ kcs_bmc->phase = KCS_PHASE_ABORT_ERROR2;
+ break;
+
+ case KCS_PHASE_ABORT_ERROR2:
+ set_state(kcs_bmc, IDLE_STATE);
+ read_data(kcs_bmc);
+ write_data(kcs_bmc, KCS_ZERO_DATA);
+ kcs_bmc->phase = KCS_PHASE_IDLE;
+ break;
+
+ default:
+ kcs_force_abort(kcs_bmc);
+ break;
+ }
+}
+
+static void kcs_bmc_handle_cmd(struct kcs_bmc *kcs_bmc)
+{
+ u8 cmd;
+
+ set_state(kcs_bmc, WRITE_STATE);
+ write_data(kcs_bmc, KCS_ZERO_DATA);
+
+ cmd = read_data(kcs_bmc);
+ switch (cmd) {
+ case KCS_CMD_WRITE_START:
+ kcs_bmc->phase = KCS_PHASE_WRITE_START;
+ kcs_bmc->error = KCS_NO_ERROR;
+ kcs_bmc->data_in_avail = false;
+ kcs_bmc->data_in_idx = 0;
+ break;
+
+ case KCS_CMD_WRITE_END:
+ if (kcs_bmc->phase != KCS_PHASE_WRITE_DATA) {
+ kcs_force_abort(kcs_bmc);
+ break;
+ }
+
+ kcs_bmc->phase = KCS_PHASE_WRITE_END_CMD;
+ break;
+
+ case KCS_CMD_GET_STATUS_ABORT:
+ if (kcs_bmc->error == KCS_NO_ERROR)
+ kcs_bmc->error = KCS_ABORTED_BY_COMMAND;
+
+ kcs_bmc->phase = KCS_PHASE_ABORT_ERROR1;
+ kcs_bmc->data_in_avail = false;
+ kcs_bmc->data_in_idx = 0;
+ break;
+
+ default:
+ kcs_force_abort(kcs_bmc);
+ kcs_bmc->error = KCS_ILLEGAL_CONTROL_CODE;
+ break;
+ }
+}
+
+int kcs_bmc_handle_event(struct kcs_bmc *kcs_bmc)
+{
+ unsigned long flags;
+ int ret = 0;
+ u8 status;
+
+ spin_lock_irqsave(&kcs_bmc->lock, flags);
+
+ if (!kcs_bmc->running) {
+ kcs_force_abort(kcs_bmc);
+ ret = -ENODEV;
+ goto out_unlock;
+ }
+
+ status = read_status(kcs_bmc) & (KCS_STATUS_IBF | KCS_STATUS_CMD_DAT);
+
+ switch (status) {
+ case KCS_STATUS_IBF | KCS_STATUS_CMD_DAT:
+ kcs_bmc_handle_cmd(kcs_bmc);
+ break;
+
+ case KCS_STATUS_IBF:
+ kcs_bmc_handle_data(kcs_bmc);
+ break;
+
+ default:
+ ret = -ENODATA;
+ break;
+ }
+
+out_unlock:
+ spin_unlock_irqrestore(&kcs_bmc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(kcs_bmc_handle_event);
+
+static inline struct kcs_bmc *to_kcs_bmc(struct file *filp)
+{
+ return container_of(filp->private_data, struct kcs_bmc, miscdev);
+}
+
+static int kcs_bmc_open(struct inode *inode, struct file *filp)
+{
+ struct kcs_bmc *kcs_bmc = to_kcs_bmc(filp);
+ int ret = 0;
+
+ spin_lock_irq(&kcs_bmc->lock);
+ if (!kcs_bmc->running)
+ kcs_bmc->running = 1;
+ else
+ ret = -EBUSY;
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ return ret;
+}
+
+static __poll_t kcs_bmc_poll(struct file *filp, poll_table *wait)
+{
+ struct kcs_bmc *kcs_bmc = to_kcs_bmc(filp);
+ __poll_t mask = 0;
+
+ poll_wait(filp, &kcs_bmc->queue, wait);
+
+ spin_lock_irq(&kcs_bmc->lock);
+ if (kcs_bmc->data_in_avail)
+ mask |= EPOLLIN;
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ return mask;
+}
+
+static ssize_t kcs_bmc_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct kcs_bmc *kcs_bmc = to_kcs_bmc(filp);
+ bool data_avail;
+ size_t data_len;
+ ssize_t ret;
+
+ if (!(filp->f_flags & O_NONBLOCK))
+ wait_event_interruptible(kcs_bmc->queue,
+ kcs_bmc->data_in_avail);
+
+ mutex_lock(&kcs_bmc->mutex);
+
+ spin_lock_irq(&kcs_bmc->lock);
+ data_avail = kcs_bmc->data_in_avail;
+ if (data_avail) {
+ data_len = kcs_bmc->data_in_idx;
+ memcpy(kcs_bmc->kbuffer, kcs_bmc->data_in, data_len);
+ }
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ if (!data_avail) {
+ ret = -EAGAIN;
+ goto out_unlock;
+ }
+
+ if (count < data_len) {
+ pr_err("channel=%u with too large data : %zu\n",
+ kcs_bmc->channel, data_len);
+
+ spin_lock_irq(&kcs_bmc->lock);
+ kcs_force_abort(kcs_bmc);
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ ret = -EOVERFLOW;
+ goto out_unlock;
+ }
+
+ if (copy_to_user(buf, kcs_bmc->kbuffer, data_len)) {
+ ret = -EFAULT;
+ goto out_unlock;
+ }
+
+ ret = data_len;
+
+ spin_lock_irq(&kcs_bmc->lock);
+ if (kcs_bmc->phase == KCS_PHASE_WRITE_DONE) {
+ kcs_bmc->phase = KCS_PHASE_WAIT_READ;
+ kcs_bmc->data_in_avail = false;
+ kcs_bmc->data_in_idx = 0;
+ } else {
+ ret = -EAGAIN;
+ }
+ spin_unlock_irq(&kcs_bmc->lock);
+
+out_unlock:
+ mutex_unlock(&kcs_bmc->mutex);
+
+ return ret;
+}
+
+static ssize_t kcs_bmc_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct kcs_bmc *kcs_bmc = to_kcs_bmc(filp);
+ ssize_t ret;
+
+ /* a minimum response size '3' : netfn + cmd + ccode */
+ if (count < 3 || count > KCS_MSG_BUFSIZ)
+ return -EINVAL;
+
+ mutex_lock(&kcs_bmc->mutex);
+
+ if (copy_from_user(kcs_bmc->kbuffer, buf, count)) {
+ ret = -EFAULT;
+ goto out_unlock;
+ }
+
+ spin_lock_irq(&kcs_bmc->lock);
+ if (kcs_bmc->phase == KCS_PHASE_WAIT_READ) {
+ kcs_bmc->phase = KCS_PHASE_READ;
+ kcs_bmc->data_out_idx = 1;
+ kcs_bmc->data_out_len = count;
+ memcpy(kcs_bmc->data_out, kcs_bmc->kbuffer, count);
+ write_data(kcs_bmc, kcs_bmc->data_out[0]);
+ ret = count;
+ } else {
+ ret = -EINVAL;
+ }
+ spin_unlock_irq(&kcs_bmc->lock);
+
+out_unlock:
+ mutex_unlock(&kcs_bmc->mutex);
+
+ return ret;
+}
+
+static long kcs_bmc_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ struct kcs_bmc *kcs_bmc = to_kcs_bmc(filp);
+ long ret = 0;
+
+ spin_lock_irq(&kcs_bmc->lock);
+
+ switch (cmd) {
+ case IPMI_BMC_IOCTL_SET_SMS_ATN:
+ update_status_bits(kcs_bmc, KCS_STATUS_SMS_ATN,
+ KCS_STATUS_SMS_ATN);
+ break;
+
+ case IPMI_BMC_IOCTL_CLEAR_SMS_ATN:
+ update_status_bits(kcs_bmc, KCS_STATUS_SMS_ATN,
+ 0);
+ break;
+
+ case IPMI_BMC_IOCTL_FORCE_ABORT:
+ kcs_force_abort(kcs_bmc);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ return ret;
+}
+
+static int kcs_bmc_release(struct inode *inode, struct file *filp)
+{
+ struct kcs_bmc *kcs_bmc = to_kcs_bmc(filp);
+
+ spin_lock_irq(&kcs_bmc->lock);
+ kcs_bmc->running = 0;
+ kcs_force_abort(kcs_bmc);
+ spin_unlock_irq(&kcs_bmc->lock);
+
+ return 0;
+}
+
+static const struct file_operations kcs_bmc_fops = {
+ .owner = THIS_MODULE,
+ .open = kcs_bmc_open,
+ .read = kcs_bmc_read,
+ .write = kcs_bmc_write,
+ .release = kcs_bmc_release,
+ .poll = kcs_bmc_poll,
+ .unlocked_ioctl = kcs_bmc_ioctl,
+};
+
+struct kcs_bmc *kcs_bmc_alloc(struct device *dev, int sizeof_priv, u32 channel)
+{
+ struct kcs_bmc *kcs_bmc;
+
+ kcs_bmc = devm_kzalloc(dev, sizeof(*kcs_bmc) + sizeof_priv, GFP_KERNEL);
+ if (!kcs_bmc)
+ return NULL;
+
+ dev_set_name(dev, "ipmi-kcs%u", channel);
+
+ spin_lock_init(&kcs_bmc->lock);
+ kcs_bmc->channel = channel;
+
+ mutex_init(&kcs_bmc->mutex);
+ init_waitqueue_head(&kcs_bmc->queue);
+
+ kcs_bmc->data_in = devm_kmalloc(dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
+ kcs_bmc->data_out = devm_kmalloc(dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
+ kcs_bmc->kbuffer = devm_kmalloc(dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
+ if (!kcs_bmc->data_in || !kcs_bmc->data_out || !kcs_bmc->kbuffer)
+ return NULL;
+
+ kcs_bmc->miscdev.minor = MISC_DYNAMIC_MINOR;
+ kcs_bmc->miscdev.name = dev_name(dev);
+ kcs_bmc->miscdev.fops = &kcs_bmc_fops;
+
+ return kcs_bmc;
+}
+EXPORT_SYMBOL(kcs_bmc_alloc);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Haiyue Wang <haiyue.wang@linux.intel.com>");
+MODULE_DESCRIPTION("KCS BMC to handle the IPMI request from system software");
diff --git a/drivers/char/ipmi/kcs_bmc.h b/drivers/char/ipmi/kcs_bmc.h
new file mode 100644
index 000000000000..eb9ea4ce78b8
--- /dev/null
+++ b/drivers/char/ipmi/kcs_bmc.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2015-2018, Intel Corporation.
+ */
+
+#ifndef __KCS_BMC_H__
+#define __KCS_BMC_H__
+
+#include <linux/miscdevice.h>
+
+/* Different phases of the KCS BMC module.
+ * KCS_PHASE_IDLE:
+ * BMC should not be expecting nor sending any data.
+ * KCS_PHASE_WRITE_START:
+ * BMC is receiving a WRITE_START command from system software.
+ * KCS_PHASE_WRITE_DATA:
+ * BMC is receiving a data byte from system software.
+ * KCS_PHASE_WRITE_END_CMD:
+ * BMC is waiting a last data byte from system software.
+ * KCS_PHASE_WRITE_DONE:
+ * BMC has received the whole request from system software.
+ * KCS_PHASE_WAIT_READ:
+ * BMC is waiting the response from the upper IPMI service.
+ * KCS_PHASE_READ:
+ * BMC is transferring the response to system software.
+ * KCS_PHASE_ABORT_ERROR1:
+ * BMC is waiting error status request from system software.
+ * KCS_PHASE_ABORT_ERROR2:
+ * BMC is waiting for idle status afer error from system software.
+ * KCS_PHASE_ERROR:
+ * BMC has detected a protocol violation at the interface level.
+ */
+enum kcs_phases {
+ KCS_PHASE_IDLE,
+
+ KCS_PHASE_WRITE_START,
+ KCS_PHASE_WRITE_DATA,
+ KCS_PHASE_WRITE_END_CMD,
+ KCS_PHASE_WRITE_DONE,
+
+ KCS_PHASE_WAIT_READ,
+ KCS_PHASE_READ,
+
+ KCS_PHASE_ABORT_ERROR1,
+ KCS_PHASE_ABORT_ERROR2,
+ KCS_PHASE_ERROR
+};
+
+/* IPMI 2.0 - Table 9-4, KCS Interface Status Codes */
+enum kcs_errors {
+ KCS_NO_ERROR = 0x00,
+ KCS_ABORTED_BY_COMMAND = 0x01,
+ KCS_ILLEGAL_CONTROL_CODE = 0x02,
+ KCS_LENGTH_ERROR = 0x06,
+ KCS_UNSPECIFIED_ERROR = 0xFF
+};
+
+/* IPMI 2.0 - 9.5, KCS Interface Registers
+ * @idr: Input Data Register
+ * @odr: Output Data Register
+ * @str: Status Register
+ */
+struct kcs_ioreg {
+ u32 idr;
+ u32 odr;
+ u32 str;
+};
+
+struct kcs_bmc {
+ spinlock_t lock;
+
+ u32 channel;
+ int running;
+
+ /* Setup by BMC KCS controller driver */
+ struct kcs_ioreg ioreg;
+ u8 (*io_inputb)(struct kcs_bmc *kcs_bmc, u32 reg);
+ void (*io_outputb)(struct kcs_bmc *kcs_bmc, u32 reg, u8 b);
+
+ enum kcs_phases phase;
+ enum kcs_errors error;
+
+ wait_queue_head_t queue;
+ bool data_in_avail;
+ int data_in_idx;
+ u8 *data_in;
+
+ int data_out_idx;
+ int data_out_len;
+ u8 *data_out;
+
+ struct mutex mutex;
+ u8 *kbuffer;
+
+ struct miscdevice miscdev;
+
+ unsigned long priv[];
+};
+
+static inline void *kcs_bmc_priv(struct kcs_bmc *kcs_bmc)
+{
+ return kcs_bmc->priv;
+}
+
+int kcs_bmc_handle_event(struct kcs_bmc *kcs_bmc);
+struct kcs_bmc *kcs_bmc_alloc(struct device *dev, int sizeof_priv,
+ u32 channel);
+#endif /* __KCS_BMC_H__ */
diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
new file mode 100644
index 000000000000..3c955946e647
--- /dev/null
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2015-2018, Intel Corporation.
+ */
+
+#define pr_fmt(fmt) "aspeed-kcs-bmc: " fmt
+
+#include <linux/atomic.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/regmap.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+
+#include "kcs_bmc.h"
+
+
+#define DEVICE_NAME "ast-kcs-bmc"
+
+#define KCS_CHANNEL_MAX 4
+
+/* mapped to lpc-bmc@0 IO space */
+#define LPC_HICR0 0x000
+#define LPC_HICR0_LPC3E BIT(7)
+#define LPC_HICR0_LPC2E BIT(6)
+#define LPC_HICR0_LPC1E BIT(5)
+#define LPC_HICR2 0x008
+#define LPC_HICR2_IBFIF3 BIT(3)
+#define LPC_HICR2_IBFIF2 BIT(2)
+#define LPC_HICR2_IBFIF1 BIT(1)
+#define LPC_HICR4 0x010
+#define LPC_HICR4_LADR12AS BIT(7)
+#define LPC_HICR4_KCSENBL BIT(2)
+#define LPC_LADR3H 0x014
+#define LPC_LADR3L 0x018
+#define LPC_LADR12H 0x01C
+#define LPC_LADR12L 0x020
+#define LPC_IDR1 0x024
+#define LPC_IDR2 0x028
+#define LPC_IDR3 0x02C
+#define LPC_ODR1 0x030
+#define LPC_ODR2 0x034
+#define LPC_ODR3 0x038
+#define LPC_STR1 0x03C
+#define LPC_STR2 0x040
+#define LPC_STR3 0x044
+
+/* mapped to lpc-host@80 IO space */
+#define LPC_HICRB 0x080
+#define LPC_HICRB_IBFIF4 BIT(1)
+#define LPC_HICRB_LPC4E BIT(0)
+#define LPC_LADR4 0x090
+#define LPC_IDR4 0x094
+#define LPC_ODR4 0x098
+#define LPC_STR4 0x09C
+
+struct aspeed_kcs_bmc {
+ struct regmap *map;
+};
+
+
+static u8 aspeed_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg)
+{
+ struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc);
+ u32 val = 0;
+ int rc;
+
+ rc = regmap_read(priv->map, reg, &val);
+ WARN(rc != 0, "regmap_read() failed: %d\n", rc);
+
+ return rc == 0 ? (u8) val : 0;
+}
+
+static void aspeed_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data)
+{
+ struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc);
+ int rc;
+
+ rc = regmap_write(priv->map, reg, data);
+ WARN(rc != 0, "regmap_write() failed: %d\n", rc);
+}
+
+
+/*
+ * AST_usrGuide_KCS.pdf
+ * 2. Background:
+ * we note D for Data, and C for Cmd/Status, default rules are
+ * A. KCS1 / KCS2 ( D / C:X / X+4 )
+ * D / C : CA0h / CA4h
+ * D / C : CA8h / CACh
+ * B. KCS3 ( D / C:XX2h / XX3h )
+ * D / C : CA2h / CA3h
+ * D / C : CB2h / CB3h
+ * C. KCS4
+ * D / C : CA4h / CA5h
+ */
+static void aspeed_kcs_set_address(struct kcs_bmc *kcs_bmc, u16 addr)
+{
+ struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc);
+
+ switch (kcs_bmc->channel) {
+ case 1:
+ regmap_update_bits(priv->map, LPC_HICR4,
+ LPC_HICR4_LADR12AS, 0);
+ regmap_write(priv->map, LPC_LADR12H, addr >> 8);
+ regmap_write(priv->map, LPC_LADR12L, addr & 0xFF);
+ break;
+
+ case 2:
+ regmap_update_bits(priv->map, LPC_HICR4,
+ LPC_HICR4_LADR12AS, LPC_HICR4_LADR12AS);
+ regmap_write(priv->map, LPC_LADR12H, addr >> 8);
+ regmap_write(priv->map, LPC_LADR12L, addr & 0xFF);
+ break;
+
+ case 3:
+ regmap_write(priv->map, LPC_LADR3H, addr >> 8);
+ regmap_write(priv->map, LPC_LADR3L, addr & 0xFF);
+ break;
+
+ case 4:
+ regmap_write(priv->map, LPC_LADR4, ((addr + 1) << 16) |
+ addr);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static void aspeed_kcs_enable_channel(struct kcs_bmc *kcs_bmc, bool enable)
+{
+ struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc);
+
+ switch (kcs_bmc->channel) {
+ case 1:
+ if (enable) {
+ regmap_update_bits(priv->map, LPC_HICR2,
+ LPC_HICR2_IBFIF1, LPC_HICR2_IBFIF1);
+ regmap_update_bits(priv->map, LPC_HICR0,
+ LPC_HICR0_LPC1E, LPC_HICR0_LPC1E);
+ } else {
+ regmap_update_bits(priv->map, LPC_HICR0,
+ LPC_HICR0_LPC1E, 0);
+ regmap_update_bits(priv->map, LPC_HICR2,
+ LPC_HICR2_IBFIF1, 0);
+ }
+ break;
+
+ case 2:
+ if (enable) {
+ regmap_update_bits(priv->map, LPC_HICR2,
+ LPC_HICR2_IBFIF2, LPC_HICR2_IBFIF2);
+ regmap_update_bits(priv->map, LPC_HICR0,
+ LPC_HICR0_LPC2E, LPC_HICR0_LPC2E);
+ } else {
+ regmap_update_bits(priv->map, LPC_HICR0,
+ LPC_HICR0_LPC2E, 0);
+ regmap_update_bits(priv->map, LPC_HICR2,
+ LPC_HICR2_IBFIF2, 0);
+ }
+ break;
+
+ case 3:
+ if (enable) {
+ regmap_update_bits(priv->map, LPC_HICR2,
+ LPC_HICR2_IBFIF3, LPC_HICR2_IBFIF3);
+ regmap_update_bits(priv->map, LPC_HICR0,
+ LPC_HICR0_LPC3E, LPC_HICR0_LPC3E);
+ regmap_update_bits(priv->map, LPC_HICR4,
+ LPC_HICR4_KCSENBL, LPC_HICR4_KCSENBL);
+ } else {
+ regmap_update_bits(priv->map, LPC_HICR0,
+ LPC_HICR0_LPC3E, 0);
+ regmap_update_bits(priv->map, LPC_HICR4,
+ LPC_HICR4_KCSENBL, 0);
+ regmap_update_bits(priv->map, LPC_HICR2,
+ LPC_HICR2_IBFIF3, 0);
+ }
+ break;
+
+ case 4:
+ if (enable)
+ regmap_update_bits(priv->map, LPC_HICRB,
+ LPC_HICRB_IBFIF4 | LPC_HICRB_LPC4E,
+ LPC_HICRB_IBFIF4 | LPC_HICRB_LPC4E);
+ else
+ regmap_update_bits(priv->map, LPC_HICRB,
+ LPC_HICRB_IBFIF4 | LPC_HICRB_LPC4E,
+ 0);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static irqreturn_t aspeed_kcs_irq(int irq, void *arg)
+{
+ struct kcs_bmc *kcs_bmc = arg;
+
+ if (!kcs_bmc_handle_event(kcs_bmc))
+ return IRQ_HANDLED;
+
+ return IRQ_NONE;
+}
+
+static int aspeed_kcs_config_irq(struct kcs_bmc *kcs_bmc,
+ struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ int irq;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ return devm_request_irq(dev, irq, aspeed_kcs_irq, IRQF_SHARED,
+ dev_name(dev), kcs_bmc);
+}
+
+static const struct kcs_ioreg ast_kcs_bmc_ioregs[KCS_CHANNEL_MAX] = {
+ { .idr = LPC_IDR1, .odr = LPC_ODR1, .str = LPC_STR1 },
+ { .idr = LPC_IDR2, .odr = LPC_ODR2, .str = LPC_STR2 },
+ { .idr = LPC_IDR3, .odr = LPC_ODR3, .str = LPC_STR3 },
+ { .idr = LPC_IDR4, .odr = LPC_ODR4, .str = LPC_STR4 },
+};
+
+static int aspeed_kcs_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct aspeed_kcs_bmc *priv;
+ struct kcs_bmc *kcs_bmc;
+ u32 chan, addr;
+ int rc;
+
+ rc = of_property_read_u32(dev->of_node, "kcs_chan", &chan);
+ if ((rc != 0) || (chan == 0 || chan > KCS_CHANNEL_MAX)) {
+ dev_err(dev, "no valid 'kcs_chan' configured\n");
+ return -ENODEV;
+ }
+
+ rc = of_property_read_u32(dev->of_node, "kcs_addr", &addr);
+ if (rc) {
+ dev_err(dev, "no valid 'kcs_addr' configured\n");
+ return -ENODEV;
+ }
+
+ kcs_bmc = kcs_bmc_alloc(dev, sizeof(*priv), chan);
+ if (!kcs_bmc)
+ return -ENOMEM;
+
+ priv = kcs_bmc_priv(kcs_bmc);
+ priv->map = syscon_node_to_regmap(dev->parent->of_node);
+ if (IS_ERR(priv->map)) {
+ dev_err(dev, "Couldn't get regmap\n");
+ return -ENODEV;
+ }
+
+ kcs_bmc->ioreg = ast_kcs_bmc_ioregs[chan - 1];
+ kcs_bmc->io_inputb = aspeed_kcs_inb;
+ kcs_bmc->io_outputb = aspeed_kcs_outb;
+
+ dev_set_drvdata(dev, kcs_bmc);
+
+ aspeed_kcs_set_address(kcs_bmc, addr);
+ aspeed_kcs_enable_channel(kcs_bmc, true);
+ rc = aspeed_kcs_config_irq(kcs_bmc, pdev);
+ if (rc)
+ return rc;
+
+ rc = misc_register(&kcs_bmc->miscdev);
+ if (rc) {
+ dev_err(dev, "Unable to register device\n");
+ return rc;
+ }
+
+ pr_info("channel=%u addr=0x%x idr=0x%x odr=0x%x str=0x%x\n",
+ chan, addr,
+ kcs_bmc->ioreg.idr, kcs_bmc->ioreg.odr, kcs_bmc->ioreg.str);
+
+ return 0;
+}
+
+static int aspeed_kcs_remove(struct platform_device *pdev)
+{
+ struct kcs_bmc *kcs_bmc = dev_get_drvdata(&pdev->dev);
+
+ misc_deregister(&kcs_bmc->miscdev);
+
+ return 0;
+}
+
+static const struct of_device_id ast_kcs_bmc_match[] = {
+ { .compatible = "aspeed,ast2400-kcs-bmc" },
+ { .compatible = "aspeed,ast2500-kcs-bmc" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ast_kcs_bmc_match);
+
+static struct platform_driver ast_kcs_bmc_driver = {
+ .driver = {
+ .name = DEVICE_NAME,
+ .of_match_table = ast_kcs_bmc_match,
+ },
+ .probe = aspeed_kcs_probe,
+ .remove = aspeed_kcs_remove,
+};
+module_platform_driver(ast_kcs_bmc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Haiyue Wang <haiyue.wang@linux.intel.com>");
+MODULE_DESCRIPTION("Aspeed device interface to the KCS BMC device");